Monadic Grade Up means

Grade Up

      ⍋ 33 11 44 66 22
2 5 1 3 4

      names←'Joe' 'Sue' 'Sam'
      ages←34 22 25

      names[⍋ages]
┌───┬───┬───┐
│Sue│Sam│Joe│
└───┴───┴───┘

      ⍋ 'ABC' ⎕NULL ⍬ ¯3j4 'A'
3 2 4 5 1

Dyadic Grade Up means

Dyadic Grade Up

      ⍋ 'Banana'
1 2 4 6 3 5

      'an' ⍋ 'Banana'
2 4 6 3 5 1

Language Elements